var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var httpProxy = require('http-proxy');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var app = express();
const proxy = httpProxy.createProxyServer();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);

// app.all('*', (req, res) => {
//   console.log(req.url);
//   // 将请求转发到目标服务器
//   proxy.web(req, res, {
//     target: req.url
//   });

//   // 监听 'proxyRes' 事件，拦截响应数据
//   proxy.on('proxyRes', (proxyRes, req, res) => {
//     let body = [];
//     proxyRes.on('data', (chunk) => {
//       body.push(chunk);
//     });
//     proxyRes.on('end', () => {
//       body = Buffer.concat(body).toString();
//       // 在这里对响应数据进行处理
//       // console.log(body);
//       console.log(11111);
//     });
//   });
// });


// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');

  console.log(req.url);
  // 将请求转发到目标服务器
  proxy.web(req, res, {
    target: req.url
  });

  // 监听 'proxyRes' 事件，拦截响应数据
  proxy.on('proxyRes', (proxyRes, req, res) => {
    let body = [];
    proxyRes.on('data', (chunk) => {
      body.push(chunk);
    });
    proxyRes.on('end', () => {
      body = Buffer.concat(body).toString();
      // 在这里对响应数据进行处理
      // console.log(body);
      res.end(body)
    });
  });
});

module.exports = app;
